Patent US4342829A successfully refreshed from Google Patents.
US4342829A
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Process for preparing narasin
Assignee: Eli Lilly and Co
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Filing: 1981-05-06
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Granted: 1982-08-03
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Expires: 2001-05-06
Abstract
Abstract The new microorganism Streptomyces granuloruber, NRRL 12389 and the fermentation process for preparing narasin by submerged aerobic fermentation of this organism.
Inventors
- 👤 Ralph E. Kastner
- 👤 Robert L. Hamil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:42
CPC Classifications
C; C07; C07H; C07H19/00; C07H19/01; A; A61; A61P; A61P31/00; A61P31/04; C12; C12N; C12N1/00; C12N1/20; C12N1/205; C12R; C12R2001/00; C12R2001/01; C12R2001/465; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/886
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
55 words
The method of producing the antibiotic narasin which comprises cultivating Streptomyces granuloruber, NRRL 12389, or a narasin-producing mutant or variant thereof, in a culture medium containing assimilable sources of carbohydrate, nitrogen, and inorganic salts under submerged aerobic fermentation conditions until a substantial amount of antibiotic activity is produced by said organism in said culture medium.
Claim 2
Independent Claim
55 words
The method of producing the antibiotic narasin which comprises cultivating Streptomyces granuloruber, NRRL 12389, or a narasin-producing mutant or variant thereof, in a culture medium containing assimilable sources of carbohydrate, nitrogen, and inorganic salts under submerged aerobic fermentation conditions until a substantial amount of antibiotic activity is produced by said organism in said culture medium.
Claim 3
Dependent Claim
13 words
The method of claim 1 wherein the organism is Streptomyces granuloruber, NRRL 12389.
Claim 4
Independent Claim
19 words
The method of claims 1 or 2 which includes the additional step of separating narasin from the culture medium.
Claim 5
Dependent Claim
11 words
A biologically pure culture of the microorganism Streptomyces granuloruber, NRRL 12389.
Claim 6
Dependent Claim
11 words
A biologically pure culture of the microorganism Streptomyces granuloruber, NRRL 12389.
References Cited (Backward Citations)
US4038384A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-08-02 | 1986-02-01 | 1986-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-02 | 1990-02-01 | 1990-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-02 | 1994-02-01 | 1994-08-03 | $7700.00 | Window Closed / Lapsed |